You keep a knocking but you can't come in.

My brother was watching the house while I was away and caught these photos of a skunk or skunks trying to get back under the house after we sealed up their point of entry.

His triumphant email read: 

Try as they might, they can't get back in. Brent and I
put the lockdown on Pepe Le Pew's house of fun. Too bad
for them. :P